Truncated octahedral bipyramidal TiO2/MXene Ti3C2 hybrids with enhanced photocatalytic H2 production activity

Yang Li; Dainan Zhang; Xionghan Feng; Yulong Liao; Qiye Wen; Quanjun Xiang

doi:10.1039/C9NA00023B

Truncated octahedral bipyramidal TiO₂/MXene Ti₃C₂ hybrids with enhanced photocatalytic H₂ production activity†

Yang Li,^ab Dainan Zhang,^a Xionghan Feng,

^b Yulong Liao,

^a Qiye Wen^a and Quanjun Xiang

*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China
E-mail: xiangqj@uestc.edu.cn

^b College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, P. R. China

Abstract

MXene Ti₃C₂/TiO₂ hybrids were successfully synthesized through a simple calcination of F-terminated Ti₃C₂. The resultant Ti₃C₂/TiO₂ composite photocatalysts retained a 2D multilayer structure like MXene Ti₃C₂, and TiO₂ exhibited a truncated octahedral bipyramidal structure with exposed (001) facets under the participation of fluorine ions. The residual Ti₃C₂ could act as a co-catalyst to enhance the photocatalytic H₂ production activity by capturing photogenerated electrons from TiO₂ because of its electron reservoir feature and suitable Fermi level. The (101)–(001) surface heterojunction of the truncated octahedral bipyramidal TiO₂ further accelerated the separation of photogenerated carriers. As a result, the Ti₃C₂/TiO₂ hybrids with calcining F-terminated Ti₃C₂ exhibited photocatalytic hydrogen production that is twofold higher than that of Ti₃C₂/TiO₂ hybrids with calcining OH-terminated Ti₃C₂. This work presented a new strategy to prepare MXene Ti₃C₂/TiO₂ hybrids for photoconversion applications.

This article is part of the themed collection: Photocatalysis and Photoelectrochemistry

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Article information

DOI: https://doi.org/10.1039/C9NA00023B
Article type: Paper
Submitted: 14 Jan 2019
Accepted: 03 Mar 2019
First published: 04 Mar 2019
This article is Open Access

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Nanoscale Adv., 2019,1, 1812-1818

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Truncated octahedral bipyramidal TiO₂/MXene Ti₃C₂ hybrids with enhanced photocatalytic H₂ production activity

Y. Li, D. Zhang, X. Feng, Y. Liao, Q. Wen and Q. Xiang, Nanoscale Adv., 2019, 1, 1812 DOI: 10.1039/C9NA00023B

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